JBoss.com :: The Professional Open Source Company: "Linux Magazine, June 2004
A Killer App for AOP
JBoss 4's implementation of AOP makes the development, deployment, and maintenance of middleware a snap
Bill Burke and Marc Fleury
Pioneered at Xerox's Palo Alto Research Center (PARC) in the late '80s and early '90s, aspect-oriented programming (AOP) has greatly influenced modern software development, from the latest research at IBM, to the tag-driven development nature of Microsoft's .NET and C# environments. Indeed, AOP has been gaining an even wider audience of late: its research community is extremely active, a number of open source projects offer a wealth of implementations, and, as a natural complement to object-oriented programming (OOP), developers are discovering that AOP provides for more intuitive, extensible, and flexible middleware. If you're an enterprise software developer, JDK 1.5, the newest release of Java, combined with JBoss AOP, available in JBoss 4, may just be the best thing since sliced bread."
Also note there is a demo here: http://docs.jboss.org/jbosside/jboss-ide-aop-demo/